How accurate is this anniversary calculator?

It is precise to the second. We calculate the exact duration between your selected start date and the current moment using your browser's time settings.

Is my relationship data private?

Yes, 100%. This tool runs locally in your browser (Client-Side). We do not store, save, or transmit your relationship dates to any server.

How are shared heartbeats calculated?

We use the average resting heart rate for adults (approx. 80 beats per minute) to estimate how many times your hearts have beaten since you met.

Can I calculate future anniversaries?

Currently, this tool is designed to calculate time elapsed for past dates. We are building a separate "Milestone Predictor" for future dates.

We’ve been together for how long? 😲

How to Use the Anniversary Calculator

Select your date: Pick the exact day you met, started dating, or got married.
Click Calculate: Our tool instantly computes the time difference to the second.
Share the love: Use the share button to send a "Milestone Card" to your partner.

Is This Accurate?

Yes. We calculate the exact duration between your start date and your device's current time. Heartbeats (80bpm) and breaths (16bpm) are estimates based on human averages—a fun way to visualize the life you've shared!

🏆 Fun Milestones to Celebrate

🎉 100 Days: The "Honeymoon" Phase Milestone.
🏆 1,000 Days: The "Kilo-versary" (2 years, 8 months).
⏳ 1 Million Minutes: Approx 1 year, 11 months.
💍 5 Years: The "Wood" Anniversary.

More Tools for Couples

Once you know how long you've been together, find new ways to connect:

📅 Date Night Generator Can't decide what to do? Spin the wheel. 💬 Conversation Starters Deep questions for road trips & dates.

*Note: More tools coming soon!

Relationship Anniversary Calculator